What is the chmod command in Linux, and how do you use it?

You can use the chmod command to change the file permissions of the directories. It offers a simple way to control the read and write permissions. For instance, if you want to change the permission of the ABC.sh script and give it the write and executable permission, you can run the below command:

chmod u+wx ABC.sh
The chmod command is not limited to the write (w), read (r), and executable (x) permissions because there are symbolic modes and numeric modes, which you can learn from this guide.